扒高踩低

1. • crawl high, step low (idiom) unprincipled crawling, flattering one's superiors and trampling on one's juniors
2. • toadying and bullying

Character by character

• 扒(pá)rake up
• 高(gāo)surname Gao
• 踩(cǎi)step on
• 低(dī)low